JP2009166868A - Paper-made container with spout - Google Patents
Paper-made container with spout Download PDFInfo
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- JP2009166868A JP2009166868A JP2008006626A JP2008006626A JP2009166868A JP 2009166868 A JP2009166868 A JP 2009166868A JP 2008006626 A JP2008006626 A JP 2008006626A JP 2008006626 A JP2008006626 A JP 2008006626A JP 2009166868 A JP2009166868 A JP 2009166868A
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- Prior art keywords
- container
- paper
- spout
- sleeve
- blank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 25
- 239000002648 laminated material Substances 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 14
- 229920003023 plastic Polymers 0.000 claims abstract description 11
- 239000004033 plastic Substances 0.000 claims abstract description 11
- 238000001746 injection moulding Methods 0.000 claims description 22
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 239000007924 injection Substances 0.000 abstract description 4
- 238000007789 sealing Methods 0.000 abstract description 4
- 238000002347 injection Methods 0.000 abstract description 3
- 239000000243 solution Substances 0.000 abstract 1
- 239000000123 paper Substances 0.000 description 63
- 229920005989 resin Polymers 0.000 description 40
- 239000011347 resin Substances 0.000 description 40
- 238000000034 method Methods 0.000 description 18
- 239000010408 film Substances 0.000 description 16
- 229920001684 low density polyethylene Polymers 0.000 description 13
- 239000004702 low-density polyethylene Substances 0.000 description 13
- 238000003475 lamination Methods 0.000 description 12
- -1 polypropylene, ethylene-vinyl acetate Polymers 0.000 description 12
- 238000001125 extrusion Methods 0.000 description 9
- 229920001577 copolymer Polymers 0.000 description 8
- 238000000465 moulding Methods 0.000 description 8
- 230000004888 barrier function Effects 0.000 description 7
- 239000007789 gas Substances 0.000 description 7
- 239000004743 Polypropylene Substances 0.000 description 6
- 239000005038 ethylene vinyl acetate Substances 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 229920005672 polyolefin resin Polymers 0.000 description 5
- 229920001155 polypropylene Polymers 0.000 description 5
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 description 4
- 229920001903 high density polyethylene Polymers 0.000 description 4
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- 239000004701 medium-density polyethylene Substances 0.000 description 4
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 229910052814 silicon oxide Inorganic materials 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 4
- 229920000178 Acrylic resin Polymers 0.000 description 3
- 239000004925 Acrylic resin Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 3
- 229910052809 inorganic oxide Inorganic materials 0.000 description 3
- 229920000554 ionomer Polymers 0.000 description 3
- 239000002655 kraft paper Substances 0.000 description 3
- 229920000092 linear low density polyethylene Polymers 0.000 description 3
- 239000004707 linear low-density polyethylene Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 229920001083 polybutene Polymers 0.000 description 3
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- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 238000007740 vapor deposition Methods 0.000 description 3
- PZWQOGNTADJZGH-SNAWJCMRSA-N (2e)-2-methylpenta-2,4-dienoic acid Chemical compound OC(=O)C(/C)=C/C=C PZWQOGNTADJZGH-SNAWJCMRSA-N 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- JMMZCWZIJXAGKW-UHFFFAOYSA-N 2-methylpent-2-ene Chemical compound CCC=C(C)C JMMZCWZIJXAGKW-UHFFFAOYSA-N 0.000 description 2
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 2
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229920005648 ethylene methacrylic acid copolymer Polymers 0.000 description 2
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 2
- 239000001530 fumaric acid Substances 0.000 description 2
- 235000021056 liquid food Nutrition 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 2
- 239000011976 maleic acid Substances 0.000 description 2
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 2
- 235000013336 milk Nutrition 0.000 description 2
- 239000008267 milk Substances 0.000 description 2
- 210000004080 milk Anatomy 0.000 description 2
- 229920006122 polyamide resin Polymers 0.000 description 2
- 229920001225 polyester resin Polymers 0.000 description 2
- 239000004645 polyester resin Substances 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920005990 polystyrene resin Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 239000005033 polyvinylidene chloride Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 235000013618 yogurt Nutrition 0.000 description 2
- DHKHKXVYLBGOIT-UHFFFAOYSA-N 1,1-Diethoxyethane Chemical compound CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229920000007 Nylon MXD6 Polymers 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000011354 acetal resin Substances 0.000 description 1
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 1
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 1
- 229920001893 acrylonitrile styrene Polymers 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000009820 dry lamination Methods 0.000 description 1
- STVZJERGLQHEKB-UHFFFAOYSA-N ethylene glycol dimethacrylate Chemical compound CC(=C)C(=O)OCCOC(=O)C(C)=C STVZJERGLQHEKB-UHFFFAOYSA-N 0.000 description 1
- 239000004715 ethylene vinyl alcohol Substances 0.000 description 1
- 229920006226 ethylene-acrylic acid Polymers 0.000 description 1
- 229920005680 ethylene-methyl methacrylate copolymer Polymers 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- SCUZVMOVTVSBLE-UHFFFAOYSA-N prop-2-enenitrile;styrene Chemical compound C=CC#N.C=CC1=CC=CC=C1 SCUZVMOVTVSBLE-UHFFFAOYSA-N 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- VSZWPYCFIRKVQL-UHFFFAOYSA-N selanylidenegallium;selenium Chemical compound [Se].[Se]=[Ga].[Se]=[Ga] VSZWPYCFIRKVQL-UHFFFAOYSA-N 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000009757 thermoplastic moulding Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Landscapes
- Containers Having Bodies Formed In One Piece (AREA)
Abstract
Description
本発明は、主にジュース、牛乳、ヨーグルトなどの液状食品を収納する注出口付き紙容器に関するもので、さらに詳しくは、紙基材層の両面に少なくとも熱可塑性樹脂層を積層した積層材料からなり、天部と胴部および底部からなる筒状の注出口付き紙容器に関するものである。 The present invention relates to a paper container with a spout that mainly stores liquid foods such as juice, milk, and yogurt. More specifically, the present invention comprises a laminated material in which at least a thermoplastic resin layer is laminated on both sides of a paper base material layer. Further, the present invention relates to a cylindrical paper container with a spout comprising a top part, a body part and a bottom part.
従来、紙基材層の両面に少なくとも熱可塑性樹脂層を積層した積層材料からなり、天部と胴部および底部からなる筒状の注出口付き紙容器は、図９に示すように、胴部（１）のブランク（Ｂ）形状が矩形形状からなり、スリーブ状に成形した段階では、容器天部側の上端部（３）の周長と容器底部側の下端部（４）の周長とが同じ長さであるが、図１０に示すように、製品になった時点で容器底部側の下端部（４）の幅（Ｌ２）が容器天部側の上端部（３）の幅（Ｌ１）より狭くなってしまう問題がある。 Conventionally, a paper container with a cylindrical spout made of a laminated material in which at least a thermoplastic resin layer is laminated on both sides of a paper base material layer, and has a top portion, a trunk portion, and a bottom portion, as shown in FIG. In the stage where the blank (B) shape of (1) is a rectangular shape and formed into a sleeve shape, the circumference of the upper end (3) on the container top side and the circumference of the lower end (4) on the container bottom side 10, the width (L2) of the lower end (4) on the container bottom side becomes the width (L1) of the upper end (3) on the container top side as shown in FIG. ) There is a problem that becomes narrower.
また、胴部（１）の肩上の容器口部（２）をインサートインジェクション成形により、プラスチックでの製造時に金型を中に通すが、コア径とスリーブ径を合わさないと内側に樹脂漏れを発生し易くなり製品上ヒケを発生させる。さらに、成形時にコアを抜き差しの際に抵抗が強く胴部材の紙が伸び易いものを使用するなどの制約が必要になる。 Also, the container mouth part (2) on the shoulder of the trunk part (1) is inserted through the mold during plastic production by insert injection molding. If the core diameter and sleeve diameter are not matched, resin leakage will occur inside. It tends to occur and causes sink marks on the product. Furthermore, there is a need for restrictions such as using a material that has strong resistance and easily stretches the paper of the body member when the core is inserted and removed during molding.
例えば、図１１に示すように、スリーブ上端部（３２）に容器の蓋部（３０）がインジェクション成形によってプラスチックで形成され、スリーブ下端部である容器底部の開口から食品が充填され、その底部がシールされて得られた包装容器であって、その蓋部（３０）が注出口（４０）を備え、注出口（４０）の内縁部が脆弱開始点（３１）を有し、容器の蓋部（３０）の本体に、その開始点（３１）を始点として、スリーブ上端部（３２）近傍を周回するように、連続的に延在する弱め線（３３）が形成されている筒状の包装容器が提案（例えば、特許文献１参照。）されているが、この場合も前述と同様の問題点がある。 For example, as shown in FIG. 11, the lid portion (30) of the container is formed of plastic by injection molding at the upper end portion (32) of the sleeve, and food is filled from the opening of the bottom portion of the sleeve, which is the lower end portion of the sleeve. A packaging container obtained by sealing, the lid part (30) having a spout (40), the inner edge of the spout (40) having a weak start point (31), and the lid part of the container A cylindrical package in which a weakening line (33) extending continuously is formed in the main body of (30) so as to go around the vicinity of the sleeve upper end (32) starting from the start point (31) A container has been proposed (see, for example, Patent Document 1), but this case also has the same problems as described above.
以下に先行技術文献を示す。
本発明は、このような従来技術の問題点を解決しようとするものであり、その課題とするところは、主にジュース、牛乳、ヨーグルトなどの液状食品を収納する注出口付き紙容器において、製品になった時点でストレート形状で見栄えが良く、容器口部を取り付ける際のインサートインジェクション成形時の樹脂漏れがなく、製品上ヒケを発生させない、成形性に優れた注出口付き紙容器を提供することを目的とするものである。 The present invention is intended to solve such problems of the prior art, and the object of the present invention is mainly a paper container with a spout for storing liquid food such as juice, milk and yogurt. To provide a paper container with a spout excellent in formability that does not cause resin sinking during insert injection molding when attaching a container mouth, and does not cause sink marks on the product. It is intended.
本発明の請求項１に係る発明は、紙基材層（１３）の両面に少なくとも熱可塑性樹脂層（１２、１５）を積層した積層材料（１１）からなり、天部と胴部および底部からなる筒状の注出口付き紙容器（Ａ）において、前記紙容器（Ａ）の胴部（１）が４枚のパネル（１Ａ、１Ｂ、１Ｃ、１Ｄ）と該両端パネル（１Ａ、１Ｄ）のいずれかに連設した糊代部（５）とが折り目線（ａ、ｂ、ｃ、ｄ）を介して扇形状に連設されたブランク（Ｂ）からなり、且つ該胴部（１）のブランク（Ｂ）を容器縦方向に縦シールしてスリーブ（Ｃ）を形成し、該スリーブ（Ｃ）の上端部（３）の天部に容器口部（２）がインサートインジェクション成形によってプラスチックで形成され、さらに該スリーブ（Ｃ）の下端部（４）に容器底部が形成されていることを特徴とする注出口付き紙容器である。 The invention according to claim 1 of the present invention is composed of a laminated material (11) in which at least a thermoplastic resin layer (12, 15) is laminated on both sides of a paper base layer (13), and includes a top portion, a trunk portion, and a bottom portion. In the cylindrical paper container with a spout (A), the body (1) of the paper container (A) is composed of four panels (1A, 1B, 1C, 1D) and both end panels (1A, 1D). The adhesive margin part (5) provided continuously to one of the blanks (B) connected in a fan shape via the crease lines (a, b, c, d), and the body part (1) The sleeve (C) is formed by vertically sealing the blank (B) in the container longitudinal direction, and the container mouth (2) is formed of plastic by insert injection molding at the top of the upper end (3) of the sleeve (C). Furthermore, a container bottom is formed at the lower end (4) of the sleeve (C). A spout-equipped paper container characterized.
本発明の請求項２に係る発明は、請求項１記載の注出口付き紙容器において、前記ブランク（Ｂ）の上端部（３）の４つの角（９）がＲ状に形成され、且つ下端部（４）の４つの角（９）がエッジ状に形成されていることを特徴とする注出口付き紙容器である。 The invention according to claim 2 of the present invention is the paper container with spout according to claim 1, wherein the four corners (9) of the upper end (3) of the blank (B) are formed in an R shape, and the lower end. It is a paper container with a spout characterized by the four corners (9) of a part (4) being formed in edge shape.
本発明の請求項３に係る発明は、請求項１又は２記載の注出口付き紙容器において、前記ブランク（Ｂ）及び前記スリーブ（Ｃ）の扇形状が上端部（３）から下端部（４）の容器底部方向に末広がりであることを特徴とする注出口付き紙容器である。 The invention according to claim 3 of the present invention is the paper container with spout according to claim 1 or 2, wherein the fan shape of the blank (B) and the sleeve (C) is changed from the upper end (3) to the lower end (4). ) Is a paper container with a spout that is widening toward the bottom of the container.
本発明に係る注出口付き紙容器は、紙基材層の両面に少なくとも熱可塑性樹脂層を積層した積層材料からなり、天部と胴部および底部からなる筒状の注出口付き紙容器において、前記紙容器の胴部が４枚のパネルと該両端パネルのいずれかに連設した糊代部とが折り目線を介して扇形状に連設されたブランクからなり、且つ該胴部のブランクを容器縦方向に縦シールして容器スリーブを形成し、該スリーブの上端部の天部に容器口部がインサートインジェクション成形によってプラスチックで形成され、さらに該スリーブの下端部に容器底部が形成されていることにより、出来上がり製品が側面から見てストレートになり、見栄えが良くなる。また、インサートインジェクション成形工程時のスリーブ供給もスタックした状態で供給が可能となり、金型への挿入もし易くなる。また、容器口部の製造時も金型でスリーブを挟んで上下でシールが可能となる。さらに、コアの抜き差しの抵抗が低くなり成形し易くなる。 The paper container with spout according to the present invention is made of a laminated material in which at least a thermoplastic resin layer is laminated on both sides of a paper base material layer, and in a cylindrical paper container with a spout formed of a top part, a body part, and a bottom part, The body portion of the paper container is composed of a blank in which four panels and an adhesive margin portion connected to any one of the both end panels are continuously provided in a fan shape via a crease line, and A container sleeve is formed by vertical sealing in the container longitudinal direction, a container mouth is formed of plastic by insert injection molding at the top of the upper end of the sleeve, and a container bottom is formed at the lower end of the sleeve. As a result, the finished product is straight when viewed from the side, and the appearance is improved. In addition, the sleeve can be supplied in a stacked state during the insert injection molding process, and can be easily inserted into the mold. In addition, when the container mouth is manufactured, it is possible to seal the top and bottom by sandwiching the sleeve with a mold. Furthermore, the resistance of inserting / removing the core is lowered and molding becomes easy.
以下に本発明の実施の形態を図１〜図８に基づいて詳細に説明する。 Embodiments of the present invention will be described below in detail with reference to FIGS.
図１は本発明に係る注出口付き紙容器の胴部のブランクの１実施例を示す平面図であり、図２は本発明に係る注出口付き紙容器の胴部のスリーブの１実施例を示す斜視図であり、図３は本発明に係る注出口付き紙容器の胴部の上端部及び下端部の形状を説明する説明図であり、図４は本発明に係る注出口付き紙容器の胴部の上端部及び下端部のサイズを説明する説明図であり、図５は本発明に係る注出口付き紙容器の１実施例を示す側断面図であり、図６は本発明に係る注出口付き紙容器の胴部のスリーブの上端部に容器口部をインサートインジェクション成形によって形成する方法を説明する説明図であり、図７は本発明に係る注出口付き紙容器にキャップを取り付けた状態の１実施例を示す平面図であり、図８は本発明に係る注出口付き紙容器の胴部を構成する積層材料の層構成の１実施例を示す側断面図である。 FIG. 1 is a plan view showing one embodiment of the blank of the trunk of the paper container with spout according to the present invention, and FIG. 2 shows one embodiment of the sleeve of the trunk of the paper container with spout according to the present invention. FIG. 3 is an explanatory view for explaining the shapes of the upper end portion and the lower end portion of the trunk portion of the paper container with spout according to the present invention, and FIG. 4 shows the paper container with spout according to the present invention. It is explanatory drawing explaining the size of the upper end part of a trunk | drum, and a lower end part, FIG. 5 is side sectional drawing which shows one Example of the paper container with a spout which concerns on this invention, FIG. 6 is the note which concerns on this invention. It is explanatory drawing explaining the method of forming a container mouth part by insert injection molding in the upper end part of the sleeve of the trunk | drum of a paper container with an outlet, FIG. 7 is the state which attached the cap to the paper container with a spout which concerns on this invention It is a top view which shows one Example of this, FIG. 8 is with the spout which concerns on this invention It is a side sectional view showing an embodiment of the layer structure of the multilayer material forming the body portion of the container.
本発明に係る注出口付き紙容器は、図８に示すように、紙基材層（１３）の両面に少なくとも熱可塑性樹脂層（１２、１５）を積層した積層材料（１１）からなり、天部と胴部および底部からなる筒状の注出口付き紙容器（Ａ）において、図１に示すように、前記紙容器（Ａ）の胴部（１）が４枚のパネル（１Ａ、１Ｂ、１Ｃ、１Ｄ）と該両端パネル（１Ａ、１Ｄ）のいずれかに連設した糊代部（５）とが折り目線（ａ、ｂ、ｃ、ｄ）を介して扇形状に連設されたブランク（Ｂ）からなり、且つ、図２に示すように、該胴部（１）のブランク（Ｂ）を容器縦方向に縦シールしてスリーブ（Ｃ）を形成し、図５に示すように、該スリーブ（Ｃ）の上端部（３）の天部に容器口部（２）がインサートインジェクション成形によってプラスチックで形成され、さらに該スリーブ（Ｃ）の下端部（４）に容器底部が形成されていることを特徴とする注出口付き紙容器である。 As shown in FIG. 8, the paper container with spout according to the present invention comprises a laminated material (11) in which at least a thermoplastic resin layer (12, 15) is laminated on both sides of a paper base material layer (13). As shown in FIG. 1, in the cylindrical paper container (A) having a spout, a body part, and a bottom part, the body part (1) of the paper container (A) has four panels (1A, 1B, 1C, 1D) and a blank portion (5) connected to one of the both end panels (1A, 1D) in a fan shape via crease lines (a, b, c, d) (B) and as shown in FIG. 2, the body (1) blank (B) is vertically sealed in the container longitudinal direction to form a sleeve (C), as shown in FIG. The container mouth (2) is made of plastic by insert injection molding at the top of the upper end (3) of the sleeve (C). Made is a further spout-equipped paper container, wherein the container bottom to the lower portion (4) is formed of said sleeve (C).
前記扇形状に連設された胴部（１）のブランク（Ｂ）の上端部（３）の４つの角（９）
をＲ状に形成し、且つ下端部（４）の４つの角（９）をエッジ状に形成する。このような形状のブランク（Ｂ）をサイドシールしてスリーブ（Ｃ）状にすると、図３に示すように、前記上端部（３）の４つの角（９）がコーナ形状になり、且つ、前記下端部（４）の４つの角（９）が鋭角形状になる見栄えの良い筒状の紙容器が得られる。
Four corners (9) of the upper end (3) of the blank (B) of the trunk (1) arranged in a fan shape
Are formed in an R shape, and the four corners (9) of the lower end (4) are formed in an edge shape. When the blank (B) having such a shape is side-sealed into a sleeve (C) shape, as shown in FIG. 3, the four corners (9) of the upper end portion (3) have a corner shape, and A cylindrical paper container having a good appearance in which the four corners (9) of the lower end portion (4) are acute-angled is obtained.
さらに、図４に示すように、前記ブランク（Ｂ）の胴部（１）の上端部（３）の幅（Ｌ３）より下端部（４）の幅（Ｌ４）を広くして、該ブランク（Ｂ）及び該スリーブ（Ｃ）の扇形状を上端部（３）から下端部（４）の容器底部方向に末広がりにしているので、図７に示すように、出来上がり製品の上端部（３）の幅（Ｌ１）と下端部（４）の幅（Ｌ２）が同一サイズとなるため、側面から見てストレートになり、見栄えが良くなる。 Furthermore, as shown in FIG. 4, the width (L4) of the lower end (4) is made wider than the width (L3) of the upper end (3) of the body (1) of the blank (B), and the blank ( B) and the fan shape of the sleeve (C) are widened from the upper end (3) toward the bottom of the container (4), so that the upper end (3) of the finished product as shown in FIG. Since the width (L1) and the width (L2) of the lower end portion (4) are the same size, it becomes straight when viewed from the side, and the appearance is improved.
このようなスリーブ（Ｃ）を用いることで、インサートインジェクション成形にて容器口部（２）の製造工程でのスリーブ（Ｃ）供給の際もスタックした状態で行えるので、スリーブ供給フィーダへのスリーブセットの手間の頻度が減り、合理的である。さらに、金型への挿入もし易くなり、さらに、コアの抜き差しの抵抗が低くなり成形し易くなる。 By using such a sleeve (C), the sleeve (C) can be supplied in a stacked state even when the sleeve (C) is supplied in the manufacturing process of the container mouth (2) by insert injection molding. The frequency of labor is reduced and reasonable. Furthermore, it becomes easy to insert into the mold, and the resistance of inserting / removing the core becomes low, so that molding becomes easy.
また、図６（ａ）に示すように、インサートインジェクション成形にて胴部（１）の上端部（３）に容器口部（肩から上）（２）を成形する製造時も、図６（ｂ）に示すように、キャビティ（金型）（７Ｍ）とコア（マンドレル金型）（７Ｎ）とでスリーブ（Ｃ）状の胴部（１）を挟んで上下でシールが可能となる。すなわち、前記容器口部（２）と胴部（１）の上端部端縁（３Ａ）と上端部側端（３Ｂ）との接合部（８）の接合が強固となる。 In addition, as shown in FIG. 6 (a), during the manufacture of molding the container mouth (up from the shoulder) (2) on the upper end (3) of the body (1) by insert injection molding, As shown in b), the cavity (mold) (7M) and the core (mandrel mold) (7N) can be sealed up and down with the sleeve (C) -shaped body (1) sandwiched therebetween. That is, the joining of the joint part (8) between the upper end edge (3A) and the upper end side end (3B) of the container mouth part (2) and the body part (1) becomes strong.
次に、本発明に係る注出口付き紙容器の胴部（１）を構成する材料、容器口部（２）の材料および該容器口部（２）のインサートインジェクション成形方法などについて説明する。 Next, the material which comprises the trunk | drum (1) of the paper container with a spout which concerns on this invention, the material of a container mouth part (2), the insert injection molding method of this container mouth part (2), etc. are demonstrated.
まず、本発明に係る注出口付き紙容器の胴部（１）を構成する積層材料としては、紙基材層の両面に熱可塑性樹脂層などを積層した積層材料を使用する。例えば、図８に示すように、表面側から、少なくとも、熱可塑性樹脂層（１２）と紙基材層（１３）と熱可塑性樹脂層（１５）とを適宜に積層した積層材料（１１）などが用いられる。 First, as the laminated material constituting the trunk (1) of the paper container with spout according to the present invention, a laminated material in which a thermoplastic resin layer or the like is laminated on both surfaces of the paper base material layer is used. For example, as shown in FIG. 8, a laminated material (11) in which at least a thermoplastic resin layer (12), a paper base layer (13), and a thermoplastic resin layer (15) are appropriately laminated from the surface side, etc. Is used.
前記最外層の熱可塑性樹脂層（１２）を形成する熱可塑性樹脂としては、熱によって溶融し、ヒートシール性を有する樹脂ならば特に制約されないが、例えば、低密度ポリエチレン、中密度ポリエチレン、高密度ポリエチレン、直鎖状低密度ポリエチレン、ポリプロピレン、エチレン−酢酸ビニル共重合体、アイオノマー樹脂、エチレン−アクリル酸共重合体、エチレン−アクリル酸エチル共重合体、エチレン−メタクリル酸共重合体、エチレン−メタクリル酸メチル共重合体、エチレン−プロピレン共重合体、メチルペンテンポリマー、ポリブテンポリマー、ポリエチレンまたはポリプロピレンなどのポリオレフィン系樹脂をアクリル酸、メタクリル酸、マレイン酸、無水マレイン酸、フマール酸、イタコン酸などの不飽和カルボン酸で変性した酸変性ポリオレフィン樹脂、ポリ酢酸ビニル系樹脂、ポリ（メタ）アクリル系樹脂、ポリビニル系樹脂、その他などの樹脂を使用することができる。 The thermoplastic resin that forms the outermost thermoplastic resin layer (12) is not particularly limited as long as it is a resin that melts by heat and has heat sealability. For example, low density polyethylene, medium density polyethylene, high density Polyethylene, linear low density polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-acrylic acid copolymer, ethylene-ethyl acrylate copolymer, ethylene-methacrylic acid copolymer, ethylene-methacrylic acid Polyolefin resins such as acid methyl copolymer, ethylene-propylene copolymer, methyl pentene polymer, polybutene polymer, polyethylene or polypropylene are not suitable for acrylic acid, methacrylic acid, maleic acid, maleic anhydride, fumaric acid, itaconic acid, etc. Change with saturated carboxylic acid The acid-modified polyolefin resins, polyvinyl acetate resins, poly (meth) acrylic resins, polyvinyl resins, the resins and other can be used.
そして、これら熱可塑性樹脂の中でも、作業性、経済性などの面から、低密度ポリエチレンを使用することが適当で、紙基材層上にエクストルージョンラミネーション法（溶融押出しラミネーション法）などによりラミネート加工を行なう。その際の厚さは、１５〜５０μｍ程度の範囲内で任意に選択して形成することが好ましい。 Of these thermoplastic resins, it is appropriate to use low-density polyethylene from the viewpoint of workability and economy. Lamination is performed on the paper substrate layer by the extrusion lamination method (melt extrusion lamination method). To do. In this case, it is preferable that the thickness is arbitrarily selected within a range of about 15 to 50 μm.
前記紙基材層（１３）としては、化学パルプなどを主原料とするパルプから抄造した坪
量が２３０〜４５０ｇ／ｍ2程度の範囲内の晒しクラフト紙、マニラボール等の板紙を選択して使用することが好ましい。
As the paper base layer (13), a paperboard such as bleached kraft paper or manila ball having a basis weight of about 230 to 450 g / m 2 made from pulp made mainly of chemical pulp or the like is selected. It is preferable to use it.
前記最内層の熱可塑性樹脂層（１５）を形成する熱可塑性樹脂は、前記最外層に使用する樹脂と同様の熱可塑性樹脂が使用される。例えば、低密度ポリエチレン、中密度ポリエチレン、高密度ポリエチレン、直鎖状低密度ポリエチレン、ポリプロピレン、エチレン−酢酸ビニル共重合体、アイオノマー樹脂、エチレン−アクリル酸共重合体、エチレン−アクリル酸エチル共重合体、エチレン−メタクリル酸共重合体、エチレン−メタクリル酸メチル共重合体、エチレン−プロピレン共重合体、メチルペンテンポリマー、ポリブテンポリマー、ポリエチレンまたはポリプロピレン等のポリオレフィン系樹脂をアクリル酸、メタクリル酸、マレイン酸、無水マレイン酸、フマール酸、イタコン酸などの不飽和カルボン酸で変性した酸変性ポリオレフィン樹脂、ポリ酢酸ビニル系樹脂、ポリ（メタ）アクリル系樹脂、ポリ塩化ビニル系樹脂、その他などの樹脂を使用することができる。 As the thermoplastic resin forming the innermost thermoplastic resin layer (15), the same thermoplastic resin as that used for the outermost layer is used. For example, low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-acrylic acid copolymer, ethylene-ethyl acrylate copolymer , Polyolefin resins such as ethylene-methacrylic acid copolymer, ethylene-methyl methacrylate copolymer, ethylene-propylene copolymer, methylpentene polymer, polybutene polymer, polyethylene or polypropylene, acrylic acid, methacrylic acid, maleic acid, Use resins such as acid-modified polyolefin resins modified with unsaturated carboxylic acids such as maleic anhydride, fumaric acid, and itaconic acid, polyvinyl acetate resins, poly (meth) acrylic resins, polyvinyl chloride resins, etc. Can That.
そして、これら熱可塑性樹脂の中でも、作業性、経済性などの面から、低密度ポリエチレンを使用することが好ましく、エクストルージョンラミネーション法（溶融押出しラミネーション法）などによりラミネート加工を行なう。また、該最内層の厚さは、３０〜１００μｍ程度の範囲内で任意に選択して形成することが好ましい。 Among these thermoplastic resins, it is preferable to use low density polyethylene from the viewpoint of workability and economy, and lamination is performed by an extrusion lamination method (melt extrusion lamination method) or the like. Moreover, it is preferable that the thickness of the innermost layer is arbitrarily selected within a range of about 30 to 100 μm.
ところで、前記紙容器に収納する内容物によっては、表面側から、少なくとも、熱可塑性樹脂層（１２）と紙基材層（１３）とガスバリア層（１４）と熱可塑性樹脂層（１５）とを適宜に積層した積層材料（１１）などが用いられる。 By the way, depending on the contents stored in the paper container, at least the thermoplastic resin layer (12), the paper base layer (13), the gas barrier layer (14), and the thermoplastic resin layer (15) are provided from the front side. An appropriately laminated material (11) or the like is used.
前記ガスバリア層（１４）については、内容物が空気中の酸素や内容物の香気成分などを遮断する目的で積層したものである。 About the said gas barrier layer (14), the content is laminated | stacked in order to interrupt | block the oxygen in the air, the aromatic component of a content, etc.
前記ガスバリア層（１４）としては、一般的には、内容物の種類、保存性、ライフサイクル期間、強度等によって選択するが、例えば、アルミニウム箔ないしその蒸着膜を有する樹脂フィルム、あるいはポリ塩化ビニリデン系樹脂もしくはエチレン−ビニルアルコール共重合体（ＥＶＯＨ）、ポリビニルアルコール（ＰＶＡ）、エチレン−酢酸ビニル共重合体（ＥＶＡ）ケン化物などのガスバリア性を有する樹脂フィルム、酸化珪素や酸化アルミニウムなどの無機酸化物を蒸着した樹脂フィルム、ナイロンＭＸＤ６樹脂フィルム、その他などを用いることができる。 The gas barrier layer (14) is generally selected depending on the type of contents, storage stability, life cycle period, strength, etc. For example, an aluminum foil or a resin film having a deposited film thereof, or polyvinylidene chloride Resin or resin film having gas barrier properties such as ethylene-vinyl alcohol copolymer (EVOH), polyvinyl alcohol (PVA), saponified ethylene-vinyl acetate copolymer (EVA), inorganic oxidation such as silicon oxide and aluminum oxide A resin film on which a product is vapor-deposited, a nylon MXD6 resin film, or the like can be used.
このガスバリア層（１４）に用いる材料としては、最近では、アルミニウム箔の廃棄処理問題などから、アルミニウム箔の代替品として、前述の無機酸化物である酸化珪素や酸化アルミニウムなどをポリエチレンテレフタレートフィルムに真空蒸着した蒸着フィルムが多用されている。 As a material used for this gas barrier layer (14), recently, due to a disposal problem of aluminum foil, as a substitute for aluminum foil, silicon oxide, aluminum oxide or the like, which is the above-mentioned inorganic oxide, is vacuum applied to a polyethylene terephthalate film. Vapor deposited films are often used.
前記無機酸化物の蒸着フィルムの蒸着薄膜としては、基本的に金属の酸化物をアモルファス（非晶質）化した薄膜であれば使用可能であり、例えば、珪素（Ｓｉ）、アルミニウム（Ａｌ）、マグネシウム（Ｍｇ）、カルシウム（Ｃａ）、カリウム（Ｋ）、錫（Ｓｎ）、ナトリウム（Ｎａ）、ホウ素（Ｂ）、チタン（Ｔｉ）、鉛（Ｐｂ）、ジルコニウム（Ｚｒ）、イットリウム（Ｙ）などの金属の酸化物をアモルファス（非晶質）化した薄膜を使用することができる。 As the vapor deposition thin film of the inorganic oxide vapor deposition film, basically, any thin film obtained by making a metal oxide amorphous can be used. For example, silicon (Si), aluminum (Al), Magnesium (Mg), calcium (Ca), potassium (K), tin (Sn), sodium (Na), boron (B), titanium (Ti), lead (Pb), zirconium (Zr), yttrium (Y), etc. It is possible to use a thin film obtained by making the metal oxide amorphous.
そして、これら金属の中でも、包装材料に使用する場合は、珪素（Ｓｉ）、アルミニウム（Ａｌ）が好ましく、これら金属の酸化物である、酸化珪素、酸化アルミニウムを真空蒸着法などにより、薄膜化することが適当である。その際の膜厚は、１０〜８０ｎｍ程度の範囲内で任意に選択して形成することが好ましい。 Among these metals, silicon (Si) and aluminum (Al) are preferable when used for packaging materials, and silicon oxide and aluminum oxide, which are oxides of these metals, are thinned by vacuum deposition or the like. Is appropriate. In this case, it is preferable that the film thickness is arbitrarily selected and formed within a range of about 10 to 80 nm.
また、前記無機酸化物の蒸着薄膜を形成するための支持体となる樹脂フィルムは、強度的に強く、耐熱性が高く、化学的に優れていれば、特に制約されるものではないが、例えば、ポリエチレン、ポリプロピレン、ポリブテンなどのポリオレフィン系樹脂、（メタ）アクリル系樹脂、ポリ塩化ビニル系樹脂、ポリスチレン系樹脂、ポリ塩化ビニリデン系樹脂、エチレン−酢酸ビニル共重合体ケン化物、ポリビニルアルコール、ポリカーボネート系樹脂、フッ素系樹脂、ポリ酢酸ビニル系樹脂、アセタール系樹脂、ポリエステル系樹脂、ポリアミド系樹脂、その他などの各種のフィルムを使用することができるが、強度などの物性面、コストなどの経済性などを考慮するとポリエステル系樹脂、ポリアミド系樹脂からなるフィルムが好ましい。その際の該樹脂フィルムの厚さは、１０〜４０μｍ程度の範囲内で任意に選択して使用することが好ましい。 In addition, the resin film as a support for forming the inorganic oxide vapor-deposited thin film is not particularly limited as long as it is strong in strength, high in heat resistance, and chemically excellent. , Polyolefin resin such as polyethylene, polypropylene, polybutene, (meth) acrylic resin, polyvinyl chloride resin, polystyrene resin, polyvinylidene chloride resin, saponified ethylene-vinyl acetate copolymer, polyvinyl alcohol, polycarbonate Various films such as resin, fluorine resin, polyvinyl acetate resin, acetal resin, polyester resin, polyamide resin, etc. can be used, but physical properties such as strength, economics such as cost, etc. In view of the above, a film made of a polyester resin or a polyamide resin is preferable. In this case, the thickness of the resin film is preferably selected and used within a range of about 10 to 40 μm.
次に、前記ガスバリア層（１４）と前記紙基材層（１３）及び最内層の熱可塑性樹脂層（１５）とを積層する方法は、例えば、ドライラミネーション方法、エクストルージョンラミネーション方法、及び該エクストルージョンラミネーション方法を利用したサンドイッチラミネーション方法などの公知の方法を使用することができる。 Next, a method of laminating the gas barrier layer (14), the paper base material layer (13), and the innermost thermoplastic resin layer (15) includes, for example, a dry lamination method, an extrusion lamination method, and the extensible method. A known method such as a sandwich lamination method using a lamination lamination method can be used.
次に、本発明に係る注出口付き紙容器を構成する胴部（１）の上端部（３）に容器口部（２）をプラスチックで形成する方法について説明する。 Next, a method for forming the container mouth part (2) with plastic at the upper end part (3) of the body part (1) constituting the paper container with spout according to the present invention will be described.
まず、前記積層材料（１１）で形成された下端部（４）の容器底部方向に末広がりになっている扇形状の胴部（１）のスリーブ（Ｃ）をインサートインジェクション成形機に装備した、図６（ａ）に示す、金型コア（７Ｎ）となるマンドレルの外面に被着させる。このマンドレルは、胴部（１）が断面矩形であれば、これに対応した矩形のものが用いられ、胴部（１）が円形であれば、これに対応した円形のものが使用される。尚、胴部（１）が扇形状をしているので、インサートインジェクション成形工程時のスリーブ供給もスタックした状態で供給が可能となり、金型への挿入もし易くなる。 First, the insert injection molding machine is equipped with a sleeve (C) of a fan-shaped body (1) that is widened toward the bottom of the container at the lower end (4) formed of the laminated material (11). It is made to adhere to the outer surface of the mandrel which becomes a mold core (7N) shown in 6 (a). If the trunk (1) has a rectangular cross section, a rectangular shape corresponding to the mandrel is used. If the trunk (1) is circular, a circular shape corresponding to the same is used. In addition, since the trunk | drum (1) is fan-shaped, the sleeve supply at the time of an insert injection molding process can also be supplied in a stacked state, and can be easily inserted into a mold.
次に、図６（ｂ）に示すように、胴部（１）を外装したマンドレルを該胴部（１）の上端部（３）が容器口部（２）を形成する空間に位置するようにキャビティ（金型）（７Ｍ）に装着する。 Next, as shown in FIG. 6 (b), the upper end (3) of the trunk (1) is positioned in a space where the upper end (3) of the trunk (1) forms the container mouth (2). To the cavity (die) (7M).
このように、スリーブ（Ｃ）状の胴部（１）は、前記キャビティ（金型）（７Ｍ）とコア（マンドレル金型）（７Ｎ）とで挟んだ状態でセットされる。 In this way, the sleeve (C) -like body (1) is set in a state of being sandwiched between the cavity (mold) (7M) and the core (mandrel mold) (7N).
次に、前記キャビティ（金型）（７Ｍ）に設けたゲート口(図示せず)からランナー（図示せず）を通して容器口部（２）を形成する空間にインサートインジェクション成形手段によりプラスチックを溶融状態で注入する。その後、前記溶融状態のプラスチックを冷却することで、胴部（１）の上端部（３）の上端部端縁（３Ａ）と上端部側端（３Ｂ）とに接合する接合部（８）を形成することで容器口部（２）が一体的に強固に形成されるものである。 Next, the plastic is melted by insert injection molding means from the gate opening (not shown) provided in the cavity (die) (7M) through the runner (not shown) to form the container opening (2). Inject with. After that, by cooling the molten plastic, the joining part (8) joined to the upper end edge (3A) and the upper end side end (3B) of the upper end part (3) of the body part (1). By forming, the container mouth part (2) is integrally and firmly formed.
最後に、スリーブ状の胴部（１）が容器底部方向に末広がりになっている扇形状をしているので、成形された容器からのコア（マンドレル金型）（７Ｎ）の抜き差しの抵抗が低くなり成形し易くなる。 Finally, since the sleeve-like body (1) has a fan shape that extends toward the bottom of the container, the resistance of inserting and removing the core (mandrel mold) (7N) from the molded container is low. Easier to mold.
次に、本発明に係る注出口付き紙容器を構成する容器口部（２）を形成するために用いられるプラスチックは、例えば、低密度ポリエチレン樹脂（ＬＤＰＥ）、中密度ポリエチレン樹脂（ＭＤＰＥ）、高密度ポリエチレン樹脂（ＨＤＰＥ）、直鎖状低密度ポリエチレン樹脂（Ｌ−ＬＤＰＥ）などのポリエチレン系樹脂、ポリプロピレン樹脂（ＰＰ）などの
ポリプロピレン系樹脂、ポリスチレン系樹脂、アクリロニトリル−スチレン共重合体（ＡＳ樹脂）、アクリロニトリル−ブタジェン−スチレン共重合体（ＡＢＳ樹脂）、ポリカーボネート系樹脂、エチレン−プロピレン共重合体（ＥＰ）、エチレン−αオレフィン共重合体、エチレン−アクリル酸共重合体（ＥＡＡ）、エチレン−メタクリル酸共重合体（ＥＭＡＡ）、エチレン−メタクリル酸エステル共重合体、エチレン−アクリル酸エステル共重合体、アイオノマー樹脂、エチレン−酢酸ビニル共重合体（ＥＶＡ）などの樹脂、その他の熱可塑性成形用樹脂を使用することができる。また、前記容器口部（２）は、必要に応じて顔料などで着色されていてもよい。
Next, the plastic used for forming the container mouth portion (2) constituting the paper container with a spout according to the present invention is, for example, low density polyethylene resin (LDPE), medium density polyethylene resin (MDPE), high Polyethylene resin such as high density polyethylene resin (HDPE) and linear low density polyethylene resin (L-LDPE), polypropylene resin such as polypropylene resin (PP), polystyrene resin, acrylonitrile-styrene copolymer (AS resin) , Acrylonitrile-butadiene-styrene copolymer (ABS resin), polycarbonate resin, ethylene-propylene copolymer (EP), ethylene-α olefin copolymer, ethylene-acrylic acid copolymer (EAA), ethylene-methacrylic acid Acid copolymer (EMAA), ethylene-methacrylate Acid ester copolymer, ethylene - acrylic acid ester copolymer, ionomer resin, ethylene - resins such as vinyl acetate copolymer (EVA), other thermoplastic molding resins. Moreover, the said container opening part (2) may be colored with the pigment etc. as needed.
次に、成形方法としては、射出成形法、押出成形法、その他などを用いて、射出ないし押出成形して製造することができる。而して、本発明においては、例えば、射出成形用金型の一方の金型内に胴部材をインサートし、しかる後、キャビティ（金型）およびコア（金型）の両金型を閉じた後、前記の射出成形用樹脂を射出し、インサート成形して、容器口部（２）を成形するインサートインジェクション成形方法が好ましい。 Next, as a molding method, it can be manufactured by injection or extrusion molding using an injection molding method, an extrusion molding method, or the like. Thus, in the present invention, for example, the body member is inserted into one mold of the injection mold, and then both the cavity (mold) and core (mold) molds are closed. Thereafter, an insert injection molding method is preferred in which the injection molding resin is injected, insert molding is performed, and the container mouth portion (2) is molded.
以下、本発明の実施例について詳細に説明するが、本発明は実施例に限定されるものではない。 Examples of the present invention will be described in detail below, but the present invention is not limited to the examples.
＜実施例１＞
本発明に係る注出口付き紙容器を構成する胴部（１）には、図８に示すように、紙基材層（１３）として、坪量２３０ｇ／ｍ2の晒クラフト紙を使用し、最外層には、低密度ポリエチレン樹脂をエクストルージョンラミネーション方法により、厚さ３０μｍの熱可塑性樹脂層（１２）を形成し、最内層には、低密度ポリエチレン樹脂をエクストルージョンラミネーション方法により、厚さ６０μｍの熱可塑性樹脂層（１５）を形成した積層材料を用いた。
<Example 1>
As shown in FIG. 8, as the paper base layer (13), bleached kraft paper having a basis weight of 230 g / m 2 is used for the trunk (1) constituting the spouted paper container according to the present invention, A thermoplastic resin layer (12) having a thickness of 30 μm is formed on the outermost layer by an extrusion lamination method with a low-density polyethylene resin, and a low-density polyethylene resin is formed on the innermost layer by a thickness of 60 μm by an extrusion lamination method. The laminated material in which the thermoplastic resin layer (15) was formed was used.
前記積層材料のシートを図１に示すように、下端部（４）に末広がりの扇形状のブランク（Ｂ）に打ち抜き、引き続いて、図２に示すように、このブランク（Ｂ）をサイド貼りしてスリーブ（Ｃ）状の胴部（１）を作製した。 As shown in FIG. 1, the laminated material sheet is punched into a fan-shaped blank (B) that spreads out at the lower end (4), and then, as shown in FIG. A sleeve (C) -like body (1) was produced.
この胴部（１）をインサートインジェクション成形機の射出成形用金型の一方のコア（金型）となるマンドレルの外面に被着させた後、容器口部（２）を成形するキャビティ（金型）とコア（金型）の両金型を閉じた後、射出成形用の熱可塑性樹脂として、低密度ポリエチレン樹脂を使用し、インサート成形して、図５に示すような、容器口部（２）を一体化した注出口付き紙容器（Ａ）を作製した。 The body (1) is attached to the outer surface of a mandrel that becomes one core (mold) of an injection mold of an insert injection molding machine, and then a cavity (mold) for molding the container mouth (2) ) And the core (mold) are closed, and a low-density polyethylene resin is used as a thermoplastic resin for injection molding, insert molding is performed, and a container mouth portion (2) as shown in FIG. ) Were integrated into a paper container with a spout (A).
＜実施例２＞
実施例１において、胴部（１）の材料構成が、最外層面側から、低密度ポリエチレン樹脂（３０μｍ）／晒クラフト紙（２３０ｇ／ｍ2）／低密度ポリエチレン樹脂（２５μｍ）／酸化珪素蒸着膜（３０ｎｍ）／ポリエチレンテレフタレートフィルム（１２μｍ）／接着剤／低密度ポリエチレン樹脂フィルム（６０μｍ）からなる積層材料を用いた以外は実施例１と同様にして実施例２の注出口付き紙容器を得た。
<Example 2>
In Example 1, the material constitution of the body part (1) is from the outermost layer surface side, low density polyethylene resin (30 μm) / bleached kraft paper (230 g / m 2 ) / low density polyethylene resin (25 μm) / silicon oxide vapor deposition A paper container with a spout of Example 2 is obtained in the same manner as in Example 1 except that a laminated material composed of a film (30 nm) / polyethylene terephthalate film (12 μm) / adhesive / low density polyethylene resin film (60 μm) is used. It was.
＜評価＞
前記実施例１及び実施例２の紙容器を専用の液体自動充填包装機にそれぞれ供給し、容器底部（４）の成形、ジュースの充填工程後、低密度ポリエチレン樹脂製のキャップ（６）を取り付けて、外観を観察した所、図７に示すように、出来上がり製品が側面から見てストレートになり、見栄えが良い注出口付き紙容器の製品化が可能になった。
<Evaluation>
The paper containers of Example 1 and Example 2 are supplied to dedicated liquid automatic filling and packaging machines, respectively, and a cap (6) made of low-density polyethylene resin is attached after forming the container bottom (4) and filling the juice. When the appearance was observed, as shown in FIG. 7, the finished product was straight when viewed from the side, and it became possible to produce a paper container with a spout having a good appearance.
１・・・胴部
２・・・容器口部
３・・・上端部
４・・・下端部
５・・・糊代部
６・・・キャップ
８・・・接合部
９・・・角
１１・・・積層材料
１２・・・熱可塑性樹脂層
１３・・・紙基材層
１４・・・ガスバリア層
１５・・・熱可塑性樹脂層
１０・・・包装容器
２０・・・容器スリーブ
３０・・・蓋部
３１・・・脆弱開始点
３２・・・スリーブ上端部
３３・・・弱め線
４０・・・注出口
５０・・・キャップ
Ａ・・・注出口付き紙容器
Ｂ・・・ブランク
Ｃ・・・スリーブ
１Ａ・・・パネル
１Ｂ・・・パネル
１Ｃ・・・パネル
１Ｄ・・・パネル
ａ、ｂ、ｃ、ｄ・・・折り目線
Ｌ１・・・上端部の幅
Ｌ２・・・下端部の幅
Ｌ３・・・上端部の幅
Ｌ４・・・下端部の幅
７Ｍ・・・キャビティ（金型）
７Ｎ・・・コア（マンドレル金型）
３Ａ・・・上端部端縁
３Ｂ・・・上端部側端
DESCRIPTION OF SYMBOLS 1 ... trunk | drum 2 ... container mouth part 3 ... upper end part 4 ... lower end part 5 ... glue margin part 6 ... cap 8 ... junction part 9 ... corner | 11. ..Laminated material 12 ... thermoplastic resin layer 13 ... paper substrate layer 14 ... gas barrier layer 15 ... thermoplastic resin layer 10 ... packaging container 20 ... container sleeve 30 ... Lid 31 ... Fragile start point 32 ... Sleeve upper end 33 ... Weak line 40 ... Spout 50 ... Cap A ... Paper container with spout B ... Blank C ...・ Sleeve 1A ... Panel 1B ... Panel 1C ... Panel 1D ... Panel a, b, c, d ... Fold line L1 ... Width of upper end L2 ... Width of lower end L3 ... Width of the upper end L4 ... Width of the lower end 7M ... Cavity (mold)
7N ... Core (mandrel mold)
3A: upper end edge 3B: upper end side edge
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| JP2008006626A JP5332208B2 (en) | 2008-01-16 | 2008-01-16 | Paper container with spout |
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|---|---|---|---|
| JP2008006626A JP5332208B2 (en) | 2008-01-16 | 2008-01-16 | Paper container with spout |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0610143U (en) * | 1992-07-17 | 1994-02-08 | 十條セントラル株式会社 | Synthetic resin container with paper sleeve with handle |
| JPH0769337A (en) * | 1992-09-22 | 1995-03-14 | Dainippon Printing Co Ltd | Composite container |
| JPH08119272A (en) * | 1994-10-26 | 1996-05-14 | Dainippon Printing Co Ltd | Composite container |
| JPH10230923A (en) * | 1997-02-19 | 1998-09-02 | Dainippon Printing Co Ltd | Compound container |
| JP2007008532A (en) * | 2005-06-30 | 2007-01-18 | Nihon Tetra Pak Kk | Packaging container |
-
2008
- 2008-01-16 JP JP2008006626A patent/JP5332208B2/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0610143U (en) * | 1992-07-17 | 1994-02-08 | 十條セントラル株式会社 | Synthetic resin container with paper sleeve with handle |
| JPH0769337A (en) * | 1992-09-22 | 1995-03-14 | Dainippon Printing Co Ltd | Composite container |
| JPH08119272A (en) * | 1994-10-26 | 1996-05-14 | Dainippon Printing Co Ltd | Composite container |
| JPH10230923A (en) * | 1997-02-19 | 1998-09-02 | Dainippon Printing Co Ltd | Compound container |
| JP2007008532A (en) * | 2005-06-30 | 2007-01-18 | Nihon Tetra Pak Kk | Packaging container |
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| R250 | Receipt of annual fees |
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